Costus spiralis (Jacq.) Roscoe: a novel source of flavones with α‐glycosidase inhibitory activity - Oliveira, Ana P. de; Coppede, Juliana S.; Bertoni, Bianca W.; Crotti, Antonio Eduardo Miller; França, Suzelei de Castro; Pereira, Ana Maria Soares; Taleb-Contini, Silvia Helena (Chemistry and Biodiversity, 2018)